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authorIdo Schimmel <idosch@mellanox.com>2019-12-14 17:53:09 +0200
committerDavid S. Miller <davem@davemloft.net>2019-12-16 16:14:42 -0800
commitee3936d658821d26de9039c64c90750ba240989d (patch)
tree4a7ac0e5fdf5a68951df8187bb60955e914508fc /net/ipv4/fib_trie.c
parentipv4: Extend FIB alias find function (diff)
downloadlinux-dev-ee3936d658821d26de9039c64c90750ba240989d.tar.xz
linux-dev-ee3936d658821d26de9039c64c90750ba240989d.zip
ipv4: Notify route if replacing currently offloaded one
When replacing a route, its replacement should only be notified in case the replaced route is of any interest to listeners. In other words, if the replaced route is currently used in the data path, which means it is the first route in the FIB alias list with the given {prefix, prefix length, table ID}. v2: * Convert to use fib_find_alias() instead of fib_find_first_alias() Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--net/ipv4/fib_trie.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 4c22e768a5b5..4c80ac0344f4 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1222,6 +1222,17 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
new_fa->tb_id = tb->tb_id;
new_fa->fa_default = -1;
+ if (fib_find_alias(&l->leaf, fa->fa_slen, 0, 0,
+ tb->tb_id, true) == fa) {
+ enum fib_event_type fib_event;
+
+ fib_event = FIB_EVENT_ENTRY_REPLACE_TMP;
+ err = call_fib_entry_notifiers(net, fib_event,
+ key, plen,
+ new_fa, extack);
+ if (err)
+ goto out_free_new_fa;
+ }
err = call_fib_entry_notifiers(net,
FIB_EVENT_ENTRY_REPLACE,
key, plen, new_fa,